Research on the Performance of Manufactured Sand Concrete with Different Stone Powder Content

The working performance and durability of medium and low strength machine-made sand concrete with different stone powder contents were studied, and the optimal range of stone powder content in machine-made sand concrete was explored. The results show that an appropriate amount of stone powder has a significant impact on the performance of machine-made sand concrete, which can increase the volume of the slurry and increase the density of the concrete, thereby improving the crack resistance of the concrete and reducing the permeability of chloride ions. Comprehensive analysis shows that the optimal range of stone powder content (mass fraction) is between 10% and 15%. In this range, the chloride ion permeability of machine-made sand concrete decreases with the increase of the stone powder content, and the dynamic elastic modulus decreases slightly with the increase of the stone powder content, but the amplitude is small (only 2%), so it is mixed A proper amount of stone powder can improve the aggregate gradation, increase the density of concrete, and improve the advantages of poor concrete workability.